<!--
 * @Descripttion: 表格选择器组件
 * @version: 1.3
 * @Author: sakuya
 * @Date: 2021年6月10日10:04:07
 * @LastEditors: sakuya
 * @LastEditTime: 2022年6月6日21:50:36
-->

<template>
  <el-select
    ref="select"
    v-model="defaultValue"
    :size="size"
    :clearable="clearable"
    :multiple="multiple"
    :collapse-tags="collapseTags"
    :collapse-tags-tooltip="collapseTagsTooltip"
    :filterable="filterable"
    :placeholder="placeholder"
    :disabled="disabled"
    :filter-method="filterMethod"
    @remove-tag="removeTag"
    @visible-change="visibleChange"
    @clear="clear"
  >
    <template #empty>
      <div
        class="sc-table-select__table"
        :style="{ width: tableWidth + 'px' }"
        v-loading="loading"
      >
        <div class="sc-table-select__header">
          <slot name="header" :form="formData" :submit="formSubmit"></slot>
        </div>
        <el-table
          ref="table"
          :data="tableData"
          :height="245"
          :highlight-current-row="!multiple"
          @row-click="click"
          @select="select"
          @select-all="selectAll"
        >
          <el-table-column
            v-if="multiple"
            type="selection"
            width="45"
          ></el-table-column>
          <el-table-column v-else type="index" width="45">
            <template #default="scope"
              ><span>{{
                scope.$index + (currentPage - 1) * pageSize + 1
              }}</span></template
            >
          </el-table-column>
          <slot></slot>
        </el-table>
        <div class="sc-table-select__page" v-if="!hidePagination">
          <el-pagination
            small
            background
            layout="prev, pager, next"
            :total="total"
            :page-size="pageSize"
            v-model:currentPage="currentPage"
            @current-change="reload"
          ></el-pagination>
        </div>
      </div>
    </template>
  </el-select>
</template>

<script>
import config from "@/config/tableSelect"

export default {
  props: {
    modelValue: null,
    apiObj: { type: Object, default: () => { } },
    params: { type: Object, default: () => { } },
    placeholder: { type: String, default: "请选择" },
    size: { type: String, default: "default" },
    clearable: { type: Boolean, default: false },
    multiple: { type: Boolean, default: false },
    filterable: { type: Boolean, default: false },
    collapseTags: { type: Boolean, default: false },
    collapseTagsTooltip: { type: Boolean, default: false },
    disabled: { type: Boolean, default: false },
    hidePagination: { type: Boolean, default: false },
    tableWidth: { type: [Number, String], default: 400 },
    mode: { type: String, default: "popover" },
    props: { type: Object, default: () => { } }
  },
  data () {
    return {
      loading: false,
      keyword: null,
      defaultValue: [],
      tableData: [],
      pageSize: config.pageSize,
      total: 0,
      currentPage: 1,
      defaultProps: {
        label: config.props.label,
        value: config.props.value,
        page: config.request.page,
        pageSize: config.request.pageSize,
        keyword: config.request.keyword
      },
      formData: {}
    }
  },
  computed: {

  },
  watch: {
    modelValue: {
      handler () {
        this.defaultValue = this.modelValue
        this.autoCurrentLabel()
      },
      deep: true
    }
  },
  mounted () {
    this.defaultProps = Object.assign(this.defaultProps, this.props)
    this.defaultValue = this.modelValue
    this.autoCurrentLabel()
  },
  methods: {
    //表格显示隐藏回调
    visibleChange (visible) {
      if (visible) {
        this.currentPage = 1
        this.keyword = null
        this.formData = {}
        this.getData()
      } else {
        this.autoCurrentLabel()
      }
    },
    //获取表格数据
    async getData () {
      this.loading = true
      var reqData = {
        [this.defaultProps.page]: this.currentPage,
        [this.defaultProps.pageSize]: this.pageSize,
        [this.defaultProps.keyword]: this.keyword
      }
      Object.assign(reqData, this.params, this.formData)
      var res = null
      if (this.apiObj.post) {
        res = await this.apiObj.post(reqData)
      } else {
        res = await this.apiObj.get(reqData)
      }
      var parseData = config.parseData(res)
      this.tableData = parseData.rows
      this.total = parseData.total
      this.loading = false
      //表格默认赋值
      this.$nextTick(() => {
        if (this.multiple) {
          this.defaultValue.forEach(row => {
            var setrow = this.tableData.filter(item => item[this.defaultProps.value] === row[this.defaultProps.value])
            if (setrow.length > 0) {
              this.$refs.table.toggleRowSelection(setrow[0], true)
            }
          })
        } else {
          var setrow = []
          if (typeof (this.defaultValue) != "undefined") {
            var setrow = this.tableData.filter(item => item[this.defaultProps.value] === this.defaultValue[this.defaultProps.value])
          } else {
            setrow = this.tableData
          }
          this.$refs.table.setCurrentRow(setrow[0])
        }
        this.$refs.table.setScrollTop(0)
      })
    },
    //插糟表单提交
    formSubmit () {
      this.currentPage = 1
      this.keyword = null
      this.getData()
    },
    //分页刷新表格
    reload () {
      this.getData()
    },
    //自动模拟options赋值
    autoCurrentLabel () {
      this.$nextTick(() => {
        if (this.multiple) {
          this.$refs.select.selected.forEach(item => {
            item.currentLabel = item.value[this.defaultProps.label]
          })
        } else {
          if (typeof (this.defaultValue) != "undefined") {
            this.$refs.select.selectedLabel = this.defaultValue[this.defaultProps.label]
          }
        }
      })
    },
    //表格勾选事件
    select (rows, row) {
      var isSelect = rows.length && rows.indexOf(row) !== -1
      if (isSelect) {
        this.defaultValue.push(row)
      } else {
        this.defaultValue.splice(this.defaultValue.findIndex(item => item[this.defaultProps.value] == row[this.defaultProps.value]), 1)
      }
      this.autoCurrentLabel()
      this.$emit('update:modelValue', this.defaultValue)
      this.$emit('change', this.defaultValue)
    },
    //表格全选事件
    selectAll (rows) {
      var isAllSelect = rows.length > 0
      if (isAllSelect) {
        rows.forEach(row => {
          var isHas = this.defaultValue.find(item => item[this.defaultProps.value] == row[this.defaultProps.value])
          if (!isHas) {
            this.defaultValue.push(row)
          }
        })
      } else {
        this.tableData.forEach(row => {
          var isHas = this.defaultValue.find(item => item[this.defaultProps.value] == row[this.defaultProps.value])
          if (isHas) {
            this.defaultValue.splice(this.defaultValue.findIndex(item => item[this.defaultProps.value] == row[this.defaultProps.value]), 1)
          }
        })
      }
      this.autoCurrentLabel()
      this.$emit('update:modelValue', this.defaultValue)
      this.$emit('change', this.defaultValue)
    },
    click (row) {
      if (this.multiple) {
        //处理多选点击行
      } else {
        this.defaultValue = row
        this.$refs.select.blur()
        this.autoCurrentLabel()
        this.$emit('update:modelValue', this.defaultValue)
        this.$emit('change', this.defaultValue)
      }
    },
    //tags删除后回调
    removeTag (tag) {
      var row = this.findRowByKey(tag[this.defaultProps.value])
      this.$refs.table.toggleRowSelection(row, false)
      this.$emit('update:modelValue', this.defaultValue)
    },
    //清空后的回调
    clear () {
      this.$emit('update:modelValue', this.defaultValue)
    },
    // 关键值查询表格数据行
    findRowByKey (value) {
      return this.tableData.find(item => item[this.defaultProps.value] === value)
    },
    filterMethod (keyword) {
      if (!keyword) {
        this.keyword = null
        return false
      }
      this.keyword = keyword
      this.getData()
    },
    // 触发select隐藏
    blur () {
      this.$refs.select.blur()
    },
    // 触发select显示
    focus () {
      this.$refs.select.focus()
    }
  }
}
</script>

<style scoped>
.sc-table-select__table {
  padding: 12px;
}

.sc-table-select__page {
  padding-top: 12px;
}
</style>